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3 years ago

Explain why iron, cobalt, and nickel are not in the same group of elements

Physics

2 answers:

neonofarm [45]3 years ago

6 0

Actually, iron, cobalt, and nickel ARE all in the same group of elements. If you look on this attachment, you will see iron, nickel, and cobalt are all medals. I circled it for you.

lisabon 2012 [21]3 years ago

3 0

Answer:

First, remember the distribution of the groups and the periods in the periodic table (see attached file)

The group is observed vertically throughout the table

And the period is observed horizontally throughout the table

As we can see in the table (see attached file), iron, cobalt and nickel are located next to each other horizontally so they belong to the same period and not to the same group

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b) $6 \Omega$ , 1.33 A

Explanation:

In this situation, we have two resistors connected in series.

The equivalent resistance of resistors in series is equal to the sum of the individual resistances, so in this circuit:

$R=R_1+R_2$

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Now we can use Ohm's Law to find the current flowing through the circuit:

$I=\frac{V}{R}$

where

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In this part, a third resistor is added in series to the circuit; so the new equivalent resistance of the circuit is

$R=R_1+R_2+R_3$

where:

$R_1=4\Omega\\R_2=1\Omega\\R_3=1\Omega$

Substituting, we find the equivalent resistance:

$R=4+1+1=6 \Omega$

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$I=\frac{V}{R}$

where

V = 8 V is the voltage supplied by the battery

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Substituting,

$I=\frac{8}{6}=1.33 A$

And the three resistors are connected in series, therefore the current flowing through each resistor is the same, 1.33 A.

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